Variation, inheritance and evolution parts 1 and 2 Flashcards

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1
Q

what does mitosis do to the number of chromosomes?

A

halves them

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2
Q

where are gametes made

A

in reproductive organs (in animals ovaries and testes)

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3
Q

cells divide by ….. to form gametes

A

meiosis

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4
Q

meiosis

A

copies of the genetic info are made]cell divides twice to form 4 gametes each with single set of chromosomes
all gametes are genetically different from each other

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5
Q

sexual reproduction involves the fusion of male and female gametes an example

A

sperm and egg in animals

pollen and egg cells in flowering plants

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6
Q

sexual reproduction

A

produced my meiosis

mixing of genetic information which leads to a variety in the offspring

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7
Q

asexual reproduction

A

only mitosis
no mixing of genetic info
leads to genetical identical clones

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8
Q

why is the study of human genome important for medical research

A

Searching for genes linked to different types of disease.
A sequence of 3 bases is the code for a particular amino acid. The order of bases controls the order in which each amino acid is assemble to produce a specific protein.
Understanding and treatment of inherited disorders.
Tracing migration patterns from the past

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9
Q

Embryo screening /gene therapy issues

ECONOMIC

A

costly and not 100% reliable

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10
Q

Embryo screening /gene therapy issues

SOCIAL

A

not available to everyone due to cost

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11
Q

Embryo screening /gene therapy issues

ETHICAL

A

Should only ‘healthy’ embryos be implanted following screening.

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